[R] Is there a package for digitizing or reading jpegs, ets. in R?

[Roger Bivand]

On Fri, 15 Aug 2003, M.Kondrin wrote:

> Peter Hovmand wrote:
> > I'm interested in digitizing some scanned time series, and looking for a 
> > solution that is easy and flexible. I thought I might be able to use R's 
> > locator() if I could get the image into a device. I noticed that there 
> > are some packages like (rimage), but it (a) doesn't seem to be available 
> > for the Windows version and forces me to upgrade a bunch of libraries 
> > for my linux system. It seems like someone should have something for 
> > digitizing maps and/or there something very obvious that I am missing 
> > here. Any suggestions would be appreciated!
> > 
> > Peter
> > 
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> > 
> > 
> 
> As far as I know there is no ready to use digitizer package for R, but 
> instead of a rimage you can try pixmap package (although it requires 
> images in pnm format - that is more memory consuming then jpeg one)

While pixmap could be used, you would need to do a lot to register the 
image and grab the axis scales. The last time I used g3data for this, it 
delivered, and took care of all the registering:

http://www.acclab.helsinki.fi/~frantz/software/g3data.php

The current version does not seem to be available for Windows (version 
1.1.4 is), is gtk+ based, there are RPMs.

Roger

> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no